<template>
  <view class="cart">
    <!-- 1 列表 -->
    <view class="cart-list">
      <view
        class="cart-item"
        v-for="(item, index) in cartList"
        :key="item.goods.id"
      >
        <!-- 1 复选框 -->
        <view class="goods-chk">
          <u-checkbox
            :value="item.checked"
            shape="circle"
            active-color="red"
            @change="handleItemCheck(index)"
          ></u-checkbox>
        </view>
        <!-- 2 图片 -->
        <view class="goods-img">
          <u-image
            width="191rpx"
            height="191rpx"
            :src="item.goods_small_logo"
          ></u-image>
        </view>
        <!-- 3 信息 -->
        <view class="goods-info">
          <!-- 名称 -->
          <view class="goods-name u-line-2">{{ item.goods_name }}</view>
          <!-- 价格和数量 -->
          <view class="goods-price-num">
            <view class="goods-price">￥{{ item.goods_price }}</view>
            <view class="goods-num-tool">
              <view class="num-btn" @click="handleNumUpdate(-1, index)">-</view>
              <view class="goods-vnum">{{ item.nums }}</view>
              <view class="num-btn" @click="handleNumUpdate(1, index)">+</view>
            </view>
          </view>
        </view>
      </view>
    </view>
    <!-- 2 统计 -->
    <view class="statistics">
      <view class="all-chk">
        <u-checkbox
          :value="allChecked"
          shape="circle"
          active-color="red"
          @change="handleAllCheck"
          >全选</u-checkbox
        >
      </view>
      <view class="all-price">
        合计: <text>￥{{ checkedPrice }}</text>
      </view>
      <view class="all-count">
        <u-button type="error" shape="circle" @click="handleGoPay"
          >去结算({{ checkedCount }})</u-button
        >
      </view>
    </view>
  </view>
</template>

<script>
import { mapState, mapGetters } from "vuex";
export default {
  computed: {
    ...mapState({
      cartList: (state) => state.cart.cartList,
    }),
    // 全选状态
    allChecked() {
      return (
        this.cartList.length && this.cartList.every((item) => item.checked)
      );
    },
    ...mapGetters("cart", ["checkedPrice", "checkedCount"]),
    // 总价格
    // checkedTotalPrices() {
    //   let price = 0;
    //   this.cartList.forEach((item) => {
    //     if (item.checked) {
    //       price += item.goods_price * item.nums;
    //     }
    //   });
    //   return price;
    // },
    // 选中数量
    // checkedTotalCount() {
    //   let count = 0;
    //   this.cartList.forEach((item) => {
    //     if (item.checked) {
    //       count += item.nums;
    //     }
    //   });
    //   return count;
    // },
  },
  methods: {
    // 选中框
    handleItemCheck(index) {
      this.$store.commit("cart/cartGoodsChecked", index);
    },
    // 数量加减
    async handleNumUpdate(unit, index) {
      if (this.cartList[index].nums === 1 && unit === -1) {
        // 弹出窗确定取消
        const [err, result] = await uni.showModal({
          title: "提示",
          content: "确定要删除?",
          showCancel: true,
          cancelText: "取消",
          cancelColor: "#000000",
          confirmText: "确定",
          confirmColor: "#3CC51F",
        });
        console.log(err, result);
        if (result.confirm) {
          this.$store.commit("cart/cartGoodsRemove", index);
        } else {
          console.log("wu");
        }
      } else {
        this.$store.commit("cart/cartGoodsNumUpdate", { unit, index });
      }
    },
    handleAllCheck() {
      const allChecked = !this.allChecked;
      this.$store.commit("cart/cartAllGoodsChecked", allChecked);
    },
    // 去结算
    handleGoPay() {
      // 1 判断当前有没有商品选中
      if (this.checkedCount === 0) {
        // 没有选中商品
        uni.showToast({
          title: "您还没有选中商品",
          icon: "none",
        });
      } else {
        console.log("跳转页面");
        uni.navigateTo({ url: "/pages/pay/pay" });
      }
    },
  },
};
</script>

<style lang="scss">
.cart {
  padding-bottom: 111rpx;
  .cart-list {
    .cart-item {
      display: flex;
      padding: 10rpx;
      border-bottom: 1rpx solid #ccc;
      .goods-chk {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .goods-img {
        flex: 3;
        display: flex;
        align-items: center;
        // justify-content: center;
      }

      .goods-info {
        color: #666;
        flex: 6;
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        .goods-name {
        }

        .goods-price-num {
          display: flex;
          justify-content: space-between;
          .goods-price {
            color: $themeColor;
          }

          .goods-num-tool {
            width: 140rpx;
            height: 40rpx;

            display: flex;
            justify-content: space-between;
            .num-btn {
              border: 1rpx solid #ccc;
              border-radius: 50%;
              width: 40rpx;
              height: 40rpx;
              text-align: center;
              line-height: 40rpx;
            }

            .goods-vnum {
            }
          }
        }
      }
    }
  }
  .statistics {
    position: fixed;
    background-color: #fff;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    border-top: 1rpx solid #ccc;
    display: flex;
    align-items: center;
    padding: 15rpx;
    .all-chk {
    }

    .all-price {
      flex: 1;
      color: #666;
      text {
      }
    }

    .all-count {
    }
  }
}
</style>